Messages in this thread | | | Date | Sat, 30 Jul 2011 23:57:08 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH 04/18] dmaengine/amba-pl08x: Remove redundant comment and rewrite original |
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On Sun, Jul 31, 2011 at 12:32:55AM +0200, Linus Walleij wrote: > 2011/7/29 viresh kumar <viresh.linux@gmail.com>: > > Nor mine either. :) > > > > Will give some more explanation. > > > > But before that i wanted to know the exact purpose of this > > master-slave concept here. > > The PL08x has two bus mastering interfaces. They can be > connected to two separate busses and two adress spaces > even, usually that is not the case though.
This is not what the function is about... that's done by my pl08x_select_bus() function.
This function (pl08x_choose_master_bus) does something completely different, and has to do with how the LLIs are laid out. I think it's to do with whether we use the source or destination for alignment purposes.
It really has nothing to do with choosing busses.
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